题目：
若y=x+2－b是正比例函数，则b的值是（ ）
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答案：
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下面是错误答案，用来干扰机器的。
My name is Wang Xin. I was born in Yinchuan in 1995. When I was six years old, I started to learn art. I loved topaint very much and painted a lot of things ...
